diff options
Diffstat (limited to 'src/parse/properties/column_rule.c')
| -rw-r--r-- | src/parse/properties/column_rule.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/src/parse/properties/column_rule.c b/src/parse/properties/column_rule.c new file mode 100644 index 0000000..ba57565 --- /dev/null +++ b/src/parse/properties/column_rule.c @@ -0,0 +1,177 @@ +/* + * This file is part of LibCSS. + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * Copyright 2012 Michael Drake <tlsa@netsurf-browser.org> + */ + +#include <assert.h> +#include <string.h> + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "parse/properties/properties.h" +#include "parse/properties/utils.h" + +/** + * Parse column-rule shorthand + * + * \param c Parsing context + * \param vector Vector of tokens to process + * \param ctx Pointer to vector iteration context + * \param result Pointer to location to receive resulting style + * \return CSS_OK on success, + * CSS_NOMEM on memory exhaustion, + * CSS_INVALID if the input is not valid + * + * Post condition: \a *ctx is updated with the next token to process + * If the input is invalid, then \a *ctx remains unchanged. + */ +css_error css__parse_column_rule(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style *result) +{ + int orig_ctx = *ctx; + int prev_ctx; + const css_token *token; + css_error error; + bool color = true; + bool style = true; + bool width = true; + css_style *color_style; + css_style *style_style; + css_style *width_style; + + /* Firstly, handle inherit */ + token = parserutils_vector_peek(vector, *ctx); + if (token == NULL) + return CSS_INVALID; + + if (is_css_inherit(c, token)) { + error = css_stylesheet_style_inherit(result, + CSS_PROP_COLUMN_RULE_COLOR); + if (error != CSS_OK) + return error; + + error = css_stylesheet_style_inherit(result, + CSS_PROP_COLUMN_RULE_STYLE); + if (error != CSS_OK) + return error; + + error = css_stylesheet_style_inherit(result, + CSS_PROP_COLUMN_RULE_WIDTH); + + if (error == CSS_OK) + parserutils_vector_iterate(vector, ctx); + + return error; + } + + /* Allocate for styles */ + error = css__stylesheet_style_create(c->sheet, &color_style); + if (error != CSS_OK) + return error; + + error = css__stylesheet_style_create(c->sheet, &style_style); + if (error != CSS_OK) { + css__stylesheet_style_destroy(color_style); + return error; + } + + error = css__stylesheet_style_create(c->sheet, &width_style); + if (error != CSS_OK) { + css__stylesheet_style_destroy(color_style); + css__stylesheet_style_destroy(style_style); + return error; + } + + /* Attempt to parse the various longhand properties */ + do { + prev_ctx = *ctx; + error = CSS_OK; + + /* Ensure that we're not about to parse another inherit */ + token = parserutils_vector_peek(vector, *ctx); + if (token != NULL && is_css_inherit(c, token)) { + error = CSS_INVALID; + goto css__parse_column_rule_cleanup; + } + + if ((color) && + (error = css__parse_column_rule_color(c, vector, + ctx, color_style)) == CSS_OK) { + color = false; + } else if ((style) && + (error = css__parse_column_rule_style(c, vector, + ctx, style_style)) == CSS_OK) { + style = false; + } else if ((width) && + (error = css__parse_column_rule_width(c, vector, + ctx, width_style)) == CSS_OK) { + width = false; + } + + if (error == CSS_OK) { + consumeWhitespace(vector, ctx); + + token = parserutils_vector_peek(vector, *ctx); + } else { + /* Forcibly cause loop to exit */ + token = NULL; + } + } while (*ctx != prev_ctx && token != NULL); + + /* Set unset properties to initial values */ + if (color) { + error = css__stylesheet_style_appendOPV(color_style, + CSS_PROP_COLUMN_RULE_COLOR, 0, + COLUMN_RULE_COLOR_SET); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + + /** TODO: initial colour should be the UA-defined initial + * value of the "color" property, not "0" */ + error = css__stylesheet_style_append(color_style, 0x00000000); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + } + + if (style) { + error = css__stylesheet_style_appendOPV(style_style, + CSS_PROP_COLUMN_RULE_STYLE, 0, + COLUMN_RULE_STYLE_NONE); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + } + + if (width) { + error = css__stylesheet_style_appendOPV(width_style, + CSS_PROP_COLUMN_RULE_WIDTH, 0, + COLUMN_RULE_WIDTH_MEDIUM); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + } + + /* Merge styles into the result */ + error = css__stylesheet_merge_style(result, color_style); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + + error = css__stylesheet_merge_style(result, style_style); + if (error != CSS_OK) + goto css__parse_column_rule_cleanup; + + error = css__stylesheet_merge_style(result, width_style); + + +css__parse_column_rule_cleanup: + + css__stylesheet_style_destroy(width_style); + css__stylesheet_style_destroy(style_style); + css__stylesheet_style_destroy(color_style); + + if (error != CSS_OK) + *ctx = orig_ctx; + + return error; +} |